Attachment for powered hammer

Patent metadata

Field	Value
Publication number	US-2025262738-A1
Application number	US-202519052384-A
Country	US
Kind code	A1
Filing date	Feb 13, 2025
Priority date	Feb 16, 2024
Publication date	Aug 21, 2025
Grant date	—

Abstract

An attachment configured for use with a powered hammer to drive a rod into the ground includes a body and an impact portion defining an impact axis. The impact portion includes a bore configured to receive a drive shank that is coupled to the powered hammer. The impact portion is configured to receive repeated impacts from the powered hammer. The attachment also includes a driving portion in which the rod is receivable. The driving portion includes a side load driving portion defining a side load driving axis. The side load driving axis is non-parallel to the impact axis.

First claim

What is claimed is:

1 . An attachment configured for use with a powered hammer to drive a rod into the ground, the attachment comprising:
a body; an impact portion defining an impact axis, the impact portion including a bore configured to receive a drive shank that is coupled to the powered hammer, the impact portion configured to receive repeated impacts from the powered hammer; and a driving portion in which the rod is receivable, the driving portion including a side load driving portion defining a side load driving axis, the side load driving axis being non-parallel to the impact axis.

2 . The attachment of claim 1 , wherein the impact axis and the side load driving axis are orientated at an acute angle relative to one another.

3 . The attachment of claim 2 , wherein the acute angle is less than 20 degrees.

4 . The attachment of claim 3 , wherein the acute angle is 4.5 degrees.

5 . The attachment of claim 1 , wherein the side load driving portion includes a one-way collet configured to transmit a driving force generated by the impacts from the powered hammer to a side of the rod, wherein the one-way collet is configured to allow the attachment to move relative to the rod in a first direction and to prevent relative movement between the attachment and the rod in a second direction, opposite the first direction.

6 . The attachment of claim 5 , wherein the one-way collet includes a frustoconical portion, and wherein the body defines a frustoconical aperture in which the one-way collet is received.

7 . The attachment of claim 6 , wherein the one-way collet includes a plurality of bearings disposed about the frustoconical portion, the plurality of bearings configured to engage the rod.

8 . The attachment of claim 7 , further comprising a biasing member that biases the one-way collet toward a position corresponding to a minimum rod diameter.

9 . An attachment configured for use with a powered hammer to drive a rod into the ground, the attachment comprising:
a body; an impact portion defining an impact axis, the impact portion including a bore configured to receive a drive shank that is coupled to the powered hammer, the impact portion configured to receive repeated impacts from the powered hammer; a driving portion in which the rod is receivable, the driving portion configured to engage the rod and transmit a driving force due to impacts from the powered hammer to the rod; and a retention device adjacent the bore of the impact portion, the retention device including a locking mechanism configured to secure the drive shank in the bore, the locking mechanism allowing axial movement of the drive shank within the bore along the impact axis.

10 . The attachment of claim 9 , wherein the drive shank defines a groove having a length measured parallel to the impact axis, and wherein the locking mechanism has dimension measured parallel to the impact axis, and wherein the dimension of the locking mechanism is less than the length of the groove.

11 . The attachment of claim 9 , wherein the locking mechanism is a fastener.

12 . The attachment of claim 9 , wherein the locking mechanism is a ball bearing or a dowel pin.

13 . The attachment of claim 9 , wherein the retention device further includes a sleeve that is moveable between a first position, in which the shank is secured within the bore, and a second position, in which the shank is removable from the bore.

14 . The attachment of claim 13 , wherein when in the first position, the sleeve forces the locking mechanism to engage the drive shank, and wherein when in the second position, the sleeve allows the locking mechanism to move away from a drive shaft.

15 . An attachment configured for use with a powered hammer to drive a rod into the ground, the attachment comprising:
a body defining an aperture; an impact portion defining an impact axis, the impact portion configured to receive repeated impacts from a drive shank of the powered hammer; and a driving portion including
a one-way collet positioned at least partially within the aperture of the body and configured to transmit a driving force generated by the impacts from the powered hammer to the rod, the one-way collet defining a driving axis that is angled relative to the impact axis,
an end cap coupled to the body and extending over a portion of the aperture, and
a biasing member disposed between the collet and the end cap.

16 . The attachment of claim 15 , wherein the end cap is a threadedly coupled to the body.

17 . The attachment of claim 16 , wherein the driving portion also includes a fastener to secure the end cap within the aperture.

18 . The attachment of claim 17 , wherein the end cap includes a base that engages the biasing member and a sidewall that extends from the base and engages an inner surface of the body, and wherein the sidewall includes a flat that is engaged by the fastener.

19 . The attachment of claim 17 , wherein the end cap includes a base that engages the biasing member and a sidewall that extends from the base and engages an inner surface of the body, and wherein the sidewall defines a notch that receives the fastener.

20 . The attachment of claim 15 , wherein the aperture defines a groove and a plurality of cavities connected to the groove, and wherein the end cap includes a plate having a plurality of lobes received in the groove through the plurality of cavities.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Bumgarner Ryan T
• Dumez Travis J
• Haim Katherine J

Classifications

• B25D1/16

  having the impacting head in the form of a sleeve slidable on a shaft, e.g. hammers for driving a valve or draw-off tube into a barrel · CPC title

• B25D17/005 Primary

  Attachments or adapters placed between tool and hammer · CPC title